Nesting arrays into NSDictionary object (Objective-C)

I would like to define tasks using NSDictionary, which I'd like to save in a plist file (I didn't have much luck with Core Data so far), but got stuck at two points:

-- When using initWithObjectsAndKeys: I can change the data type to number or boolean, using NSDate's numberWithInt: and numberWithBool: methods, respectively. I can't seem to find the method to change the type to date though开发者_JS百科. I couldn't find anything like that in the documentation.

-- The second problem I ran into was with the nested arrays. How can I add them to the dictionary?

I have uploaded a picture to here of what I am trying to achieve. Thank you in advance!

Do you mean NSNumber's +numberWithInt: and +numberWithBool: methods, not NSDate? It's NSNumber that defines those methods.

To convert a number to a date, it really depends on what the number is. If it's a UNIX timestamp, then [NSDate dateWithTimeIntervalSince1970:theTimestampInSeconds].

As for adding NSArray objects to a dictionary:

[yourDictionary setObject:yourArray forKey:@"SomeKey"];

You'll have to post some code if you need more help as your question isn't very clear.

for the date you can also use numberWithInt: and the timeIntervalSince1970 method of NSDate to get a Timestamp. Theres also a Constructor for that Timestamp.

For nested Arrays you can simply add NSArray Objects in the Dictonary.

Your plist should pick up the date format and store it using the Date type, so you can just ploug in the NSDate.

[plist setObject:theDate forKey:@"theDateKey"];

To save an array to your dictionary, use something like:

[NSDictionary dictionaryWithObjectsAndKeys:@"1", @"One", @"2", @"Two"];